I am using bitnami VM redmine. It works well. I could SSH the VM through Internet. But for the VM, I tried to apt-get update, but always gave me errors "temporary failure resolving /security.debian.org". When I started the VM, it gave me a message of "[FAILED] Failed to start Raise network interfaces." Is this message related to the error?

I tried ping 8.8.8.8 and it worked. Also I turned off all the host firewall.